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A222865 as a simple table

n a(n)
0 1
1 1
2 3
3 19
4 195
5 2551
6 41343
7 826939
8 20616795
9 658486351
10 28264985223
11 1725711709459
12 155998194920835
13 21019550046219271
14 4162663551546902223
15 1192847436856343300779
16 489879387071459457083115
17 286844271719979335180726911
18 238844671940165660117456403543

[1,1,3,19,195,2551,41343,826939,20616795,
 658486351,28264985223,1725711709459,
 155998194920835,21019550046219271,
 4162663551546902223,1192847436856343300779,
 489879387071459457083115,
 286844271719979335180726911,
 238844671940165660117456403543]

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Last modified March 24 11:49 EDT 2019. Contains 321448 sequences. (Running on oeis4.)